Padlock



Nov. 24 1,563,181

S. R. FRAIM PADLOCK Filed June '7. 1924 Patented Nov. 24, 1925.

, uNrrs SAMUEL a. seam, or LANCASTER, rnnnsvnvnnm.

PAD'LOCK.

Apphcation filed June T 0 all whom it may concern:

Be it known that I, SAMUEL RLFRAIM, a citizen of-the United States, residing at Lancaster,in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Padlocks, of which the following is a specification.

This invention relates in general to padlocks and more particularly to that class of locks employing a shackle as a retaining member for locking switches.

An object of this invention is to provide a shackle padlock which will consist in the minimum number of working parts, cheaply manufactured, readily assembled, disassembled, and replaced, and which will be of extremely sturdy construction, each part being designed especially for strength and rough usage such as a switch lock is usually subject to.

Another object of this invention is to pro vide a positive locking mechanism to comprise two main locking units separate and distinct, each being capable of securely fastening the shackle within the padlock casing independently of each other; one lockingnnit to engage the removable toe of the shackle, and the other locking unit to engage the pivoted heel of the shackle to effect the same desired purpose of locking same.

A further object of the invention is to so construct the locking units that they will be directly actuated in sequence by different wards of the key hitting and so that both units must be fully actuated before the toe of the shackle may be removed from the padlock casing.

A still further object is to provide locking units capable of having their key bearing surfaces varied by a simple adjustment in the width thereof.

lVith the foregoing and other objects in view, the invention consists in the combination and arrangement of parts and in the details of construction hereinafter described and more particularly setforth in the appended claims, certain embodiments of my invention being illustrated in the accompanying drawings in which a Figure 1 is a view in side elevation of the padlock showing the shackle in fully locked position, the key and the upper half of the casing being removed;

Figure 2 is a similar view showing the key in place, the toe of the shackle being dis- 20 therebetween.

1924. Serial No. 718,619.

engaged by one locking unitand the heel being engaged by'the other locking unit, the f shackle still being in locked position;

Figure 3 is a similar view showing the key fully rotated and the toe and heel of the shackle both disengaged by their respective lockingunits;

Figure 4 is a detail view in side elevation of the lockinglever adapted to engage the toe of the shackle;

Figure 5 is a bottom plan view of the locking bolt adapted to engage the heel of the shackle;

Figure 6 is a side elevation of the key.

Referring more particularly to the drawings the device comprises a casing, the lower half of which is shown in the drawings at 1, having a stud 2 upon which a shackle 3 is rotatably mounted. The ends 4 and .5 of the shackle will bejreferred to as the heel and toe, respectively. The heel 4 is provided with a lug 6 while the toe 5 has a suitable perforation wherebythe toe may be engaged by locking mechanism to be described. The casing is channeled at 7 and 8 for allowing the rotation ofthe heel 4 and the insertion of the toe 5, in the casing, respectively. r The locking mechanism of the device consists mainly in a locking lever 9 and bolt 10 and their corresponding parts. The lever 9 is pivotally mounted on the stud 11 of the casing and is recessed at 12 to receive a leaf spring 13 adapted tobear against the side wall of the casing and having a tendency to force the lever 9 away from that side wall about the stud 11 as a pivot. The lever 9 further provided with a projection 14 and a lockingpoint 15 adapted to engage the toe 5 of the shackle 3 in locked relation.

The locking bolt 10 is also provided with an inclined elliptical slot 16 through which the stud 17 of the casing protrudes, the slot being of such dimensions as to allow a downwardly inclined sliding movement of the bolt 10 on the stud 17. The lower side of the bolt 10 is cut away to produce two bearing surfaces 18 and 19 with a shoulder The bolt 10-also has a raised portion 21 at one end with a shoulder 22 to engage the projection 14 of the lever 9 and a curved projection 23 to engage the stud 11, Post 24, integral with the bolt 10,

serves the purpose of maintaining the bolt 10 in parallel relation to the casing, and, 111 addition thereto, the upper half serves as an llt) arm against which the spring 26 operates and to force the bolt 10 in a clockwise direction around stud 17 as a pivot.

Encircling the stud 17 and contracted between the studs 24: and 25 is a spring 2611a ing a tendency to force the bolt 10 to the left and locking position. The bolt 10 is further provided with a lug 27 adapted to engage the corresponding lug 6 on the heel at of the shackle 3 to prevent the rotation of the shackle about the pivot stud 2 and COHSGQ: release of the toe of the shackle.

In order to lock the device it is only necessary to exert a downward pressure upon the toe of the shackle. The first action which tiiikes place is the riding of the lug 6 on the upper curved surface 2-8 oi the bolt and a consequent downwardly inclined lat ral inoa'en'ient of the bolt 10 to the right against the action of the spring 26 until the lug 27 of the ball engages the lug 6 of the shackle. Simultaneously with this actual engagement, the too 5 forces the locking lug of the lever 9 to tho lett against the action of the spring 13 which forces the lug 15 back into a perforation in the toe 5 to hold the shackle in positive locked position, as shown in Figure 1.

In order to unlock the device a key 29 having a pair of wards 31 and 32 is fitted on the key stud 30 and rotated in a clockwise direction. The lower ward 51 engages the curved bearing surface 33 of the lever 9, rotating the latter, to a small degree, in a countcrcloclnvise direction about the pivot stud 11 against the action of the spring 13. This causes the locking lug 15 of the lever 9 to become disengaged from the toe 5 ot the shackle. This however, does not allow the toe to be removed from the casing as the lug 6 of the shackle heel is still engaged with the lug 27 of the bolt 10 which prevents rotation of the shackle about its pivot stud 2, shown in Figure 2.

A Further rotation of the key causes the upper ward 32 to engage the shoulder of the bolt 10 and force the latter laterally to the right in. a downwardly inclined direction against the action of the spring 26, causing the lug a?) to disengage the stud 11, the raised portion 21 to disengage the projection 14, and the lug 27 to disengage the shackle lug G. This allows the spring 26 to force the raised portion 21 upwardly about the lever pivot stud 1i and force the toe of the shackle free from the casing, the shackle now being free to rotate about its pivot stud 2, as shown in Figure 3. The lug on the bolt 1() acts as a stop means by striking the projection 14 on the lever 9 while a projection 34. on the lever 9 also acts as a stop means by striking the stud 17.

The locking lever 9 and bolt 10 are independent from each other and each in itself constitute a separate locking means, each being fully capable of securely fastening the shackle in locked position within the easing.

In the process of unlocking, the lever 5) and bolt 10 are actuated in opposite directions by different wards of the key, it being necessary for both of the wards to actuate their respective levers to the fullest extent before the shackle will be free to be removed from locked position within the padlock casing.

In varying the locking mechanism to be operated by various keys it is only necessary to vary the width of the bearing surface 19 of the bolt 10 and the bearing surface oi' the lever 9. Thus the higher the wards 1 and 2 of the key, the narrower will be the bearing surfaces 19 and 38 of the bolt 10 and bolt 9, respectively, or the farther away from the key stud will be the bearing surfaces 19 and 33 or vice versa.

It will be seen from the foregoing disclosure that there has been provided a shackle padlock comprising the minimum number of working parts designed especially for strength and capability of withstanding rough usage. Further there has been provided a padlock employing a looking mechanism simple in construction, positive in its action in double locking, and capable of being adjusted with the maximum of ease in adapting the same for different keys.

I claim- 1. A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its too free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe of said shackle, the other locking unit comprising a slotted bolt slidably and pivotally mounted on a single stud and adapted to engage the pivoted heel of said shackle in locked relation when the pad lock is locked, said lever and bolt having hearing surfaces adapted to be engaged in sequence by a key for disengaging said lever from the shackle toe and said bolt from the shackle heel, respectively.

2. A padlock comprising a casing, a shackle, and a pair 0t locking units, sai-l shackle having its heel pivoted and its too free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe of said shackle, the other locking unit comprising a bolt adapted to engage the pivoted heel of said shackle in locked relation, said bolt having an inclined elliptical slot whereby the bolt is slidably and pivotally mounted on a single stud in said casing, a projection on the other end of the bolt for engaging the pivot stud of said lever, raised portions on the same ends of said bolt and lever for preventing longitudinal movement of same relatively to said casing and to each other.

A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its toe free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe of said shackle, the other locking unit comprising a bolt adapted to engage the pivoted heel of said shackle in locked relation, said bolt having an inclined elliptical slot whereby the bolt is slidably and pivotally mounted on a single stud in said casing, a projection on the other end of the bolt for engaging the pivot stud of said lever, raised portionson the same ends of said bolt and lever for preventing longitudinal movement of same relatively to said casing and to each other, said lever and bolt having bearing surfaces adapted to be engaged in sequence respectively by a key for disengaging said lever from the shackle toe and said bolt from the shackle heel respectively.

4-. A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its toe free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe oi 'said shackle, the other locking unit comprising a bolt slidably and pivotally mounted on a single stud and adapted to engage the pivoted heel of said shackle in locked relation, bearing surfaces on the lower sides of said lever and bolt adapted to -be actuated, in sequence, respectively by a key for actuating in turn the lever about its pivot to effect a disengagement thereof from the toe of said shackle, and said bolt substantially laterally and then pivotally out oi engagement with the heel of said shackle.

5. A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its toe :liree to be inserted in said casing, one oi said locking units comprising a pivoted lever normally spring-actuated to engage the toe oi said shackle, the other locking unit comprising a bolt adapted to engage the pivoted heel of said shackle in locked relation, said bolt having an inclined elliptical slot whereby the bolt is slidably and pivot ally mounted on a single stud in said casing, a projection on the other end of the bolt for engaging the pivot stud of said lever, raised portions on the same ends of said bolt and lever for preventing longitudinal movement of same relatively to said casing and to each other, bearing surfaces on the lower sides of said lever and bolt adapted to be engaged by a key, in sequence, respectively for actuating in turn the lever about its pivot to effect a disengagement thereof from the toe of said shackle, and said bolt substantially laterally and then pivotally out of engagement with the heel of said shackle.

6. A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its toe free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe of said shackle, the other locking unit comprising a bolt adapted to engage the pivoted heel of said shackle in locked relation, said bolt having an inclined elliptical slot whereby the bolt is slidably and pivotally mounted on a single stud in said casing, a projection on the other end of said bolt for engaging the pivot stud of said lever, said lever and bolt having bearing surfaces adapted to be engaged in sequence respectively by a key for disengaging in turn said lever from the shackle toe, saidbolt projection from its stud, and said bolt from said shackle heel.

7. A padlock comprising a casing, a shackle, and a pair of locking units, said shackle having its heel pivoted and its toe free to be inserted in said casing, one of said locking units comprising a pivoted lever normally spring-actuated to engage the toe of said shackle, the other locking unit comprising a bolt adapted to engage the pivoted heel of said shackle in locked relation, said bolt having an inclined elliptical slot whereby the bolt is slidably and pivotally mounted on a single stud in said. casing, a projection on the other end of said belt for engaging the pivot stud of said lever, said. lever and bolt having bearing surfaces adapted to be engaged in sequence respectively by a key for actuating in turn said lever about its pivot and out of engagement with said shackle toe, said bolt projection slidably out of engagement with said lever pivot stud, and said bolt slidably and pivotally out of engagement with said shackle heel.

In testimony whereof I affix my signature.

AMUEL R. FRAIM. 

